Safety razor



Feb. 29, 1944. H RQHODGE 2,343,217

SAFETY RAZOR Filed April 29. 1940 :5 f INVEN'roR /22 #neer E. /oacss Z7BY 222mm MMM V A-r'roRNEYs Patented Feb. 29, 1944 UNiTED `s'm'rss:terreur cerise' t V 2343,21?l i i v i i l y. SAFETY Razon f Harry R.Hodge, New York, N. Y. Application April 29, 1940, Serial No. 332,163A

,3 claims. (ci. gt4-43) This invention relates to safety razors, andmore particularly to thatttype of safety razor wherein the bladeis'manually reciprocated. The razor of the invention hasv particularutility for quick and emergency use because of itsmanual features, itscompactness and small number of parts. y

'It/'is common practice in the eld of razor manufacture to utilize motordriven blades in safety razors for shaving. 'practice in this fieldtomanufacture safety razors infwhich the blade is movable by manuallyoperatedugearing in which. the operating means consists of grooved orroughened rollers adapted to engage the skin andbring aboutreciprocation Aof Vthemovable blade. `As a rule razors of both typesmentioned tend to 4be somewhat complicated'v in their structure andsomewhat large and cumbersome. y Y

It is one of the important objects of the present invention to providea'safety razor which by reason vof its relatively small size may bereadily carried about the person. Another objectof the invention is toprovide.. a safety razorfhaving .a simplified construction enabling theunit to be manufactured; and retailed `for a relatively low price. lAfurther object is to provide a safety razor combining simplicity cfdesign with a pronounced degree of eliiciency in the cutting operation.yVarious other objects will appear on consideration of the followingdescription of an embodiment of the invention which -may be preferred,and of the accompanying drawing illustrating said embodiment, in which:

Fig. l is a plan View of therazor;

Fig. 2 is a sectional view taken along lines 2-2 ofl Fig. 1, showing'themode of application of the razor to the face;

Fig. 3 is a side view of the cutting portion of the razor;

Fig. 4 is a plan view of the razor head; and

Fig. 5 is a detail showing the cutting teeth of the razor blades.

As shown in Fig. l, the razor I is provided with a handle I I of anyconvenient type and material, which is attached to the razor unit I2.This razor unit consists of a rectangular frame I3 of strip metal, theends of Which form a junction on the handle side of the razor. Adaptedto be inserted and supported within this frame are three members, theroller I4, the movable razor blade I and the stationary razor blade I6.The roller I4 consists of a central pin II of metal, the ends of whichare adapted to protrude through the circular openings I8 formed in It isalso common opposite endsoi the frame I3. Fixed to the pin Il is the'core vI9 of the rollen-about which, at opposite ends; a layer ofsuriacingmaterial, such as rubber ormplastic composition, is formed toobtaintwo skin bearing surfaces 2i! and 2'I.\,fl'.n order to improve.the face gripping characteristic of this surfacing material, thesurface of the same is ridged. as at Y22, or otherwise roughened ormodifiedto secure, a non-slip gripon the skin.

Between the two skin bearing surfaces 2i] and 2| of the roller, and ofllesser diameter relative thereto, is a central ringV 23 cf metal orother suitable material, around the periphery of which a zigzag camgroove, 24 having radial walls 25 and a'base 25 concentric to the rollerpin Il', is

formed. The purpose of 'this cam groove-24 is to vafford means` forbringing about 'rectilinear oscillationof the movable blade, as will lbedescribed hereinafter. Intermediate the roller-.I4 and the outertransversely'icurved` end section 2l of the frame I3 `are positionedthestationary and movable razor blades I5 and I5. The stationary bladeI6 is in the shape-of van elongated bar or plate 23v suitablyvattachedto the frame section 21 and having at `the side edgesI projecting teeth29 ,which extend outwardly and are curved to the inside, these `teethtapering, into a sharp point 30 andforming ay thin rigid grid, asshownin Figsland 5,. Hardenedcsteel is employedfin these yprojecting `teethof the stationary razor blade so as to insure maintenance of ,the normalcurvature ofthesame with vadequate 'resistance against deformation whilethe razor is employed in the shaving operation. f

The tendency of the stationary razorl blade teeth tov deform isalsoresisted ,by the adjacent positioning of the movable razor ,blade I5.This blade consists of an elongated bar or strip BI interposed betweenthe roller I4 and the stationary blade I6, having attached separably orintegrally to the side edges a plurality of outwardly extending cuttingteeth 32. As shown in Figs. l and 2, these teeth are of substantialradial thickness and of a width approximately the same as that of thestationary teeth. The ends of the teeth 32 extend beyond the ends of theteeth 29, as shown in Fig. 5, thereby constituting, either in the stateof rest or motion, a substantial support to the stationary teeth 29. Themovable blade is attached to the frame I3 by means of pins 33 which maybe round or of other conformation and which extend from the ends of theplate 3I of the movable blade I5 through opposite apertures 34 in theframe to a point beyond the same, so that the blade may be reciprocatedWithout radial displacement from its position. Rectilinear motion isimparted to this blade by means of a pin 35 attached to the movableblade bar 3| at its mid-point and extending into the groove 24, thesides of the pin engaging the Walls 25 of said groove.

The operation of the razor may now be described. The unit is-applied tothe skin, indicated at 40 in Fig. 2, With the rollerv I4 and roundedteeth 29 of the stationary blade engaging the skin. The razor is thenreciprocated manually. As the roller I4 is moved through engagement withthe skin surface, the zigzag cam groove 24 causes a rectilinear movementof the pin 35 which, since it is a part of the movable blade, causes theblade to move back and forth rectilinearly, thus bringing about ashearing or cutting action with the stationary blade teeth. Since thecutting surface of both the stationary vand movable blades are formed.as teeth with end openings, the downward movement of the razor permitsthe hair on the skin surface readily to enter into engagement with thecutting surface, the combing actiontending to lift up the `hair randinsure such engagement.` Also, since the cutting teethare curved, as.shown in Fig. 5, when the razor is moved in such direc.-

`tion `that the blade teeth are following instead of leading on the.skin surface, this curvature permits entrance of the hair vends between.the teeth also, so that cutting operation is possible 1in whicheverdirection the razor is reciprocated by the hand, that is, either movingup or moving down over the skin surface.

In this lconnection-it is pointed out that the skin surface ismaintained taut, 'whichever Way the razor is moved. When moveddownwardly inthe direction of vthe full arrow the roller tends to pullthe skin taut under the cutting blades.

When moved upwardly Vthe outer surface of the stationary blade engagesthe skin surface 'to remove a-ll slack.

Attention is directed to the simplicity of the .razor in that itisformed of only live separable parts: the .handle II, the razor .frameI3, the roller I4, the movable vblade .I5 and the stationary blade I6.Attention is also directed to the fact .that the roller is interposed.in Aline with the .handle and frame top 21, and since its diameter isgreater than that of the razor blades rits bearing surface projectsoutwardly on `both'sides -of .the razor head. Consequently,reciprocation of ythe movable blade may be accomplished on either sideof the razor, and to utilize this function of the unit stationary andmovable teeth of duplicate structure are formed on both sides of thebase plates 28 and 3I of the razor blades.

Modifications of the invention may, of course, be made and hence I donot desire to be limited to the details of the speciilc disclosureexcept insofar as limitation is required by the scope of the claimshereto appended.

I claim as my invention:

1. A safety razor comprising a flat frame forming a supporting structureand provided with a straight section, a stationary blade fastened tosaid frame section and having edges extending -beyond the framestructure on both sides thereof, a movable blade and a roller eachmounted on said frame, the movable blade being positioned between theroller and stationary blade and in operative contact with saidstationary blade, and means for transferring movement from the roller.to the movable blade, said means including a 2. A safety razorcomprising a flat open frame for-ming a continuous closed structure andprovided with a straight section, a stationary blade fastened to saidframe section and having edges extending beyond the frame structure onboth .sides thereof, a movable blade and a roller each mounted on saidframe, the movable blade` being positioned between the roller andstationary blade and `in operative contact with said stationary blade,and means including relatively slidable ,members for transferringmovement from the roller to the movable blade, said roller extendingbeyond said .frame and blades on both :sides thereof. v, i,

3. A safety razor comprising a flat frame forming a supporting structureand provided with a straight section, a stationary blade fastenedto'said frame section and having edges extending beyond the framestructure on both sides thereof,

between the roller and stationary yblade and in operati-ve contact withsaid stationary blade, and said roller comprising a core, a layer o-fvfriction material on the end sections of said core, a central ringspacing said friction layers from each other, said ring being providedwith a zig-zag cam groove on the periphery thereof, and a'mem lberprojecting from `and attached to the roller side of the movable razorlblade and engaging said roller groove, said roller and blades extendingbeyond said frame'on both sides thereof.

HARRY R. HODGE.

